Question

what is the sum of 6 + 2i and 5 - 7i

A.) 11 + 9i

B.) 1 + 5i

C.) 1 - 5i

D.) 11 - 5i

Answer 1

6+5=11
2i+(-7i)=-5i
sum=11-5i


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Answer 2

The answer you are looking for is 


D. 11 - 5i